/* SeeNU 사이트 공통 스타일
   Layout: 어두운 히어로(시작 애니메이션) → 3D 글래스 스크롤 장면 → 밝은 정보 구역들 → 신청 폼 */
:root {
  --ink: #0B1B24;
  --ink-2: #102633;
  --night: #04121A;
  --paper: #F3FAF6;
  --white: #FFFFFF;
  --fg: #0B1B24;
  --muted: #536571;
  --line: #D6E0DD;
  --green: #2EDB7F;
  --green-deep: #067A43;
  --sky: #4DB8F2;
  --sky-deep: #0A6FB3;
  --on-dark: #E8F1EE;
  --on-dark-muted: #9BB0A9;
  --radius: 18px;
  --font-mark: "Plus Jakarta Sans", "Noto Sans KR", system-ui, sans-serif;
  --font-body: "Noto Sans KR", "Plus Jakarta Sans", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
  --maxw: 1180px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
html { scroll-behavior: auto; }
body { background: var(--paper); color: var(--fg); font-family: var(--font-body); font-size: 16px; line-height: 1.65; word-break: keep-all; -webkit-font-smoothing: antialiased; }
img, canvas, svg { max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 6px; }
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
h1, h2, h3 { margin: 0; text-wrap: balance; }
p { margin: 0; }
.eyebrow { font-family: var(--font-mark); font-weight: 700; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--green-deep); }
.dark .eyebrow { color: var(--green); }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 62ch; }
.dark .lead { color: var(--on-dark-muted); }

/* 버튼 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 24px; border-radius: 999px; font: 700 16px var(--font-body); text-decoration: none; border: 1.5px solid transparent; cursor: pointer; transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn.primary { background: var(--green); color: var(--ink); }
.btn.primary:hover { background: #4BE795; }
.btn.ghost { border-color: rgba(232, 241, 238, 0.35); color: var(--on-dark); background: transparent; }
.btn.ghost:hover { border-color: var(--on-dark); }
.btn.solid-dark { background: var(--ink); color: var(--white); }

/* 머리말 */
.site-header { position: fixed; inset: 0 0 auto 0; z-index: 50; padding-top: env(safe-area-inset-top, 0px); background: rgba(4, 18, 26, 0.72); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.site-header .brand img { display: block; height: 24px; width: auto; }
.site-nav { display: flex; align-items: center; gap: clamp(10px, 2vw, 26px); font-size: 15px; color: var(--on-dark); }
.site-nav a { text-decoration: none; opacity: 0.85; }
.site-nav a:hover { opacity: 1; }
.lang { font: 700 13px var(--font-mark); letter-spacing: 0.06em; padding: 6px 12px; border-radius: 999px; border: 1px solid rgba(232, 241, 238, 0.3); background: transparent; color: var(--on-dark); cursor: pointer; }
@media (max-width: 720px) { .site-nav .opt { display: none; } }

/* 히어로 */
.dark { background: var(--night); color: var(--on-dark); }
.hero { padding-block: calc(64px + clamp(24px, 5vw, 56px)) clamp(56px, 8vw, 96px); background: radial-gradient(120% 80% at 50% 0%, #0A2A38 0%, var(--night) 60%); }
.hero .stage { width: 100%; max-width: 1080px; margin-inline: auto; aspect-ratio: 16 / 9; border-radius: 22px; overflow: hidden; box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.7); }
.hero canvas { display: block; width: 100%; height: 100%; }
.hero .copy { margin-top: clamp(28px, 4vw, 48px); display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 28px; align-items: end; }
.hero h1 { font-family: var(--font-body); font-weight: 700; font-size: clamp(30px, 4.6vw, 56px); line-height: 1.18; letter-spacing: -0.02em; }
.hero h1 em { font-style: normal; color: var(--green); }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.hero .replay { background: none; border: 0; color: var(--on-dark-muted); font: 500 14px var(--font-body); cursor: pointer; padding: 6px 0; text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 820px) { .hero .copy { grid-template-columns: minmax(0, 1fr); } }

/* 3D 스크롤 장면 */
.see { position: relative; background: linear-gradient(180deg, var(--night) 0%, var(--ink) 100%); color: var(--on-dark); }
.see .inner { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); }
.see .sticky { position: sticky; top: 64px; height: calc(100vh - 64px); display: grid; place-items: center; }
.see #glasses3d { width: 100%; height: min(70vh, 620px); display: block; }
.see .steps { display: flex; flex-direction: column; }
.see .step { min-height: 78vh; display: flex; flex-direction: column; justify-content: center; gap: 12px; padding-block: 8vh; opacity: 0.35; transition: opacity 0.4s ease; }
.see .step.on { opacity: 1; }
.see .step .no { font-family: var(--font-mark); font-weight: 800; font-size: 14px; color: var(--green); letter-spacing: 0.1em; }
.see .step h3 { font-size: clamp(26px, 3vw, 38px); line-height: 1.25; }
.see .step p { color: var(--on-dark-muted); font-size: 18px; max-width: 34ch; }
.see .hud-chip { align-self: flex-start; font-family: var(--font-mark); font-weight: 600; font-size: 15px; color: var(--green); border: 1px solid rgba(46, 219, 127, 0.4); border-radius: 10px; padding: 8px 12px; background: rgba(46, 219, 127, 0.06); }
.see .intro { padding-top: clamp(64px, 9vw, 120px); display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 860px) {
  .see .inner { grid-template-columns: minmax(0, 1fr); }
  .see .sticky { height: 52vh; top: 64px; z-index: 1; background: linear-gradient(180deg, var(--night) 80%, transparent); }
  .see #glasses3d { height: 46vh; }
  .see .step { min-height: 60vh; }
}

/* 밝은 구역 */
.band { padding-block: clamp(64px, 9vw, 120px); }
.band.white { background: var(--white); }
.band .head { display: flex; flex-direction: column; gap: 12px; margin-bottom: clamp(28px, 4vw, 48px); }
.band h2 { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.2; letter-spacing: -0.02em; }

.how { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; counter-reset: s; }
.how li { list-style: none; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; gap: 10px; counter-increment: s; }
.how li::before { content: "0" counter(s); font-family: var(--font-mark); font-weight: 800; font-size: 14px; color: var(--sky-deep); letter-spacing: 0.1em; }
.how h3 { font-size: 21px; }
.how p { color: var(--muted); }
.note { margin-top: 18px; font-size: 14px; color: var(--muted); }
ol.how { padding: 0; margin: 0; }
@media (max-width: 820px) { .how { grid-template-columns: minmax(0, 1fr); } }

.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.stat { border-top: 3px solid var(--sky-deep); padding-top: 16px; display: flex; flex-direction: column; gap: 6px; }
.stat b { font-family: var(--font-mark); font-weight: 800; font-size: clamp(36px, 5vw, 60px); letter-spacing: -0.03em; line-height: 1; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); }
.source { margin-top: 20px; font-size: 13px; color: var(--muted); }
@media (max-width: 720px) { .stats { grid-template-columns: minmax(0, 1fr); } }

/* 폼 */
.form-card { background: var(--white); border: 1px solid var(--line); border-radius: 22px; padding: clamp(22px, 4vw, 40px); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 20px; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field.full { grid-column: 1 / -1; }
.field label, .field legend { font-weight: 700; font-size: 15px; }
.field .hint { font-size: 13px; color: var(--muted); }
.field input[type=text], .field input[type=email], .field input[type=tel], .field textarea, .field select { font: 16px var(--font-body); padding: 12px 14px; border-radius: 12px; border: 1px solid #C5D2CE; background: var(--paper); color: var(--fg); width: 100%; }
.field textarea { min-height: 110px; resize: vertical; }
fieldset.field { border: 0; padding: 0; margin: 0; }
.choices { display: flex; flex-wrap: wrap; gap: 8px; }
.choices label { font-weight: 500; display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border: 1px solid #C5D2CE; border-radius: 999px; cursor: pointer; background: var(--paper); }
.choices input { accent-color: var(--green-deep); }
.consent { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 10px; padding: 16px; border-radius: 14px; background: var(--paper); font-size: 14px; }
.consent label { display: flex; gap: 10px; align-items: flex-start; font-weight: 500; }
.consent input { margin-top: 4px; accent-color: var(--green-deep); }
.consent details { color: var(--muted); }
.consent summary { cursor: pointer; font-weight: 600; color: var(--fg); }
.consent table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 13px; }
.consent th, .consent td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.submit-row { grid-column: 1 / -1; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hp { position: absolute; left: -9999px; }
@media (max-width: 720px) { .form-card { grid-template-columns: minmax(0, 1fr); } }

/* 파트너 */
.partners { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.partner { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; gap: 10px; }
.partner .name { font-family: var(--font-mark); font-weight: 800; font-size: 22px; letter-spacing: -0.02em; }
.partner .name span { font-weight: 600; }
.partner p { color: var(--muted); font-size: 15px; }
@media (max-width: 980px) { .partners { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .partners { grid-template-columns: minmax(0, 1fr); } }

/* 꼬리말 */
.site-footer { background: var(--night); color: var(--on-dark-muted); padding-block: 48px calc(48px + env(safe-area-inset-bottom, 0px)); font-size: 14px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: flex-end; }
.site-footer img { height: 26px; width: auto; display: block; margin-bottom: 10px; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--on-dark); text-decoration: none; }

/* 나타나기: 처음 화면 아래에 있는 요소만 잠깐 숨겼다가, 스크롤로 들어오면 보인다 */
.reveal.pre { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.pre.in { opacity: 1; transform: none; }

/* 문서형 페이지(IR·가이드) */
.doc-hero { padding-block: calc(64px + clamp(40px, 6vw, 80px)) clamp(40px, 6vw, 72px); }
.doc-hero h1 { font-size: clamp(32px, 4.4vw, 54px); line-height: 1.18; letter-spacing: -0.02em; }
.doc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.doc-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.doc-card h3 { font-size: 20px; }
.doc-card p, .doc-card li { color: var(--muted); }
.doc-card ul, .doc-card ol { margin: 0; padding-left: 20px; display: flex; flex-direction: column; gap: 6px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
table.data { width: 100%; border-collapse: collapse; min-width: 620px; font-size: 15px; }
table.data th, table.data td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data th { background: #EAF2EF; font-size: 13px; letter-spacing: 0.04em; }
table.data td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.tag { display: inline-block; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: #DFF6EA; color: var(--green-deep); }
.tag.plan { background: #E1EEF8; color: var(--sky-deep); }
@media (max-width: 760px) { .doc-grid { grid-template-columns: minmax(0, 1fr); } }

@media (prefers-reduced-motion: reduce) {
  .reveal.pre { opacity: 1; transform: none; transition: none; }
  .btn, .see .step { transition: none; }
}

/* 언어 전환: html[lang]에 맞는 문장만 보인다 */
html[lang="ko"] [data-l="en"], html[lang="en"] [data-l="ko"] { display: none !important; }